It may be the warmer time of the year (for most of us), but that doesn't mean we can't look ahead to the winter. This is a conceptual design of a footwarmer that is "powered" by a laptop power brick. They are regular slippers equipped with a pocket that can hold powerbricks of all shapes and sizes. Just boot up your laptop and let the brick do the rest.
This sounds like a solid way to heat your feet, but don't come running to us when you get third-degree burns on your feet because the slippers caught on fire from improper ventilation. Just for your own reference, this is from the same folks that brought you the hotdoll.